The LiveSearchWidget is a widget that can be used for a referencefield. This widget (in edit mode) will let you search for objects in a livesearch way that is very similar to the plone livesearch functionality.

This product is aims to improve the search experience by offering alternative spelling suggestions for search criteria by targeting potential misspellings and differences between British and American (US) English.

A product for monitoring search that reports on which terms were searched, with what frequency, how many results were generated, and how many times the user clicked through to a result. From the search monitoring tool, you can also set results in the site to show as "recommended" results in popular searches and activate a search results page feedback form.

PloneSearchBox is a compoment for Plone. It allows users to access quickly to a search tool. The Search can be done on the entire site, the current section of the site, or directly in search engine like google.